Login Form

2013 News

Published on Saturday, 06 April 2013 21:33 | Written by DTSB | | | Hits: 1679

The JKR Negeri Sembilan was the first to use ultra-high performance ductile concrete (UHPdC) in road bridge construction in Malaysia. A medium traffic bridge (MBT) was completed in Kampung Linsum crossing the Sungai Linggi at January 2011.

To-date, JKR Negeri Sembilan has recently constructed a dual carriageway road bridge at Jalan Kuala Klawang-Pekan Titi (Jelebu). Once again, this road bridge is a new record or bench mark in bridge construction in Malaysia as the new bridge can span up to 51m single span without any intermediate piers or support. The composite bridge was constructed using three numbers of steel fiber reinforced ultra high performance ductile concrete (UHPdC) U-trough girder 1.75m deep, topped with a 11.9m wide cast in-situ reinforced concrete deck slab. The UHPC bridge girder ends were encased in normal strength concrete abutments at the bridge site and made integral with the abutment seating. Unlike conventional bridge girder, this UHPdC girder was built without any conventional shear links at the web region. In addition, there is no conventional longitudinal high yield steel reinforcement at the girder. The concrete strength used in the precast girder have achieved a mean compressive strength over 160 MPa (which is 5 times stronger than conventional concrete). In term of durability, the concrete grade used is at least 20 times better than conventional concrete.

To date, this single span 51 meter long bridge is the Malaysia longest UHPdC composite road bridge. Ir Dr Voo who is the inventor of UHPC and the girder manufacturer has made a comparison against the conventional steel composite bridge design and it is found that this UHPdC composite bridge gives an immediate reduction of carbon footprint (i.e. CO2) up to 57%. In term of primary energy required to construct the bridge, this UHPdC bridge gives an reduction up to 66%. As a conclusion, UHPdC bridge system is a more eco-friendly system. If term of superstructure weight, the UHPdC composite has achieved an minimum superstructure weight saving of 30% if compare to conventional reinforced concrete bridge.